//
//  UIButton+EnlargeHitArea.m
//  Cat
//
//  Created by lushitong on 2019/1/31.
//  Copyright © 2019年 lushitong. All rights reserved.
//

#import "UIButton+EnlargeHitArea.h"
#import <objc/runtime.h>

@implementation UIButton (EnlargeHitArea)

@dynamic hitTestEdgeInsets;

static const NSString *KEY_HIT_TEST_EDGE_INSETS = @"HitTestEdgeInsets";

-(void)setHitTestEdgeInsets:(UIEdgeInsets)hitTestEdgeInsets {
	NSValue *value = [NSValue value:&hitTestEdgeInsets withObjCType:@encode(UIEdgeInsets)];
	objc_setAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIEdgeInsets)hitTestEdgeInsets {
	NSValue *value = objc_getAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS);
	if(value) {
		UIEdgeInsets edgeInsets; [value getValue:&edgeInsets]; return edgeInsets;
	}else {
		return UIEdgeInsetsZero;
	}
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
	if(UIEdgeInsetsEqualToEdgeInsets(self.hitTestEdgeInsets, UIEdgeInsetsZero) || !self.enabled || self.hidden) {
		return [super pointInside:point withEvent:event];
	}
	
	CGRect relativeFrame = self.bounds;
	CGRect hitFrame = UIEdgeInsetsInsetRect(relativeFrame, self.hitTestEdgeInsets);
	
	return CGRectContainsPoint(hitFrame, point);
}
@end
